Reinforced concrete or plastic slab.



R. L. DAY. REINFORCED CONRETE 0R PLASTIC SLAB, APPLICATION HLED MAY 23, 916.

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Patented June 12, 1917.

2 SHEETS-SHEET I- R. L. DAY. REINFORCED CONCRETE 0R PLASTIC SLAB.

APPLICATION FILED MAY23, 1915. mm.

Patented June 12, 1917.

2 SH EETS-SHEET 2.

the improvement ROBERT I]. DAY, OF HUNTHQI'GTDN, WEST VIRGINIA.

REINFORCED CONCRETE 0R PLASTIC SID.

neeaeoa Application filed May 23, 1916. Serial 1V0. 99,381.

To all whom it may concern: 7

Be it known that I, ROBERT L. DAY, a citizen of the United States, residing at Huntington, in the county of Cabell and State of West Virginia, have invented new and use- -ful Improvements in Reinforced Concreteor Plastic Slabs, a specification.

This invention relates to monolith reinof which the following is forced concrete construction slabs for.use

in buildings or other construction in which reinforced concrete or plastic material isused..

In carrying out the improvement it is my purpose to construct a reinforced concrete or plastic slab which shall be simple, strong, durable, light and effective and which shall supplant the ordinary pressed steel, wood or other forms employed in the construction of floors, or other construction in which reinforced concrete is used.

It is also my purpose to provide means whereby monolith reinforced concrete or plastic slabs may be made at a factory, in a mold, and the rigidity, strength, and light weight of the slab, permit of transportation from the factor to the place where used; also the slab to be made 1n close proximity to the building or other construction where used, and because of the rigidity, strength, and light weight of the slab it should be used and supersede other reinforced concrete construction.

A still further object of the invention is to'produce a reinforced concrete or lastic slab that shall have one of 'its' faces or'med with spaced parallel ribs whereby the ooves between the ribs provide pockets or semi-plastic.finishing material such as concrete, plaster, or the-like, and whereby a perfect 0nd will be afforded between the sald finishing material and the alining slabs and also whereby the danger of breaking or flaking of the several coats of the finishing materlal will be effectively obviated.

Another purpose of my' invention is to avoid and eliminate the expense of the centering which is usually erected and put in place to sustain reinforced concrete or plastic until it has hardened suficiently to sustain its own and other wei hts. My invention serves as a centering or itself, and a1] plastic material which may be added to it for further strength and finish.

With the above and other objects in view preferably constructed of metal resides in the construcset forth in the following specification and falling within the scope of the appended claim.

In the drawings:

Figure 1 is a perspective view of a monolith reinforced concrete slab constructed in accordance with the presentinvention,

Fig. 2 is a similar view showing a plurality of slabs arranged in registering alinement and the plastic facing or finishing material partly applied thereon,

Fig. 3 is a greatly enlarged sectional view approximately on the line 33 of Fig. 1, which one of the plates may be formed,

Fig. 5 is a view of a slightly different construction of the plate, and

Fig. 6 is a sectional view approximately on the line 6-6 of Fig. 5.

In carrying out my invention I provide any number of molds of the desired shape, size and material, and each of these molds 1 is formed with longitudinally extending grooves 2. Concrete or other suitable plas tic material is poured in the mold and tamped therein to produce the slab 3, and the portion of the material received in the groove of the mold from the slab upon one of its faces is provided with longitudinally extendin ribs or tongues 5.

Specification of Letters Patent. Patented June 12, 917.

Fig. 4 is a view illustrating a mold in By re erence to the drawings it will be ,IS not essential it is highly desirable, inasmuch as the finishing material, indicated by the numeral 8, will not only engage in the grooves between the ribs or tongues of the slab but also will be received in the referred to channels, so that the slabs will present additional surfaces to which the said finishing material will connect itself.

Each of the slabs preferably centrally of each of the tongues or ribs thereon has embedded therein one or a number of longitudinally extending members which are and which the plates.

materially add to the strength of entire sur- Each of the slabs across its face, has embedded in the upper side of the 1 mold, reinforcement; plaited or woven steel wire principally, which materially adds to the strength of the slab after it is formed.

It is to be understood that the molds are adapted and used at factories, to make my reinforced concrete slabs, of general and stock dimensions for the market; the slab after seasoning being of suflicient strength, rigidity, and lightness of Weight, to permit of transportation to an advantage. Also that the molds are adapted and used locally with respect to the building upon which the slabs are to be used and it will be further noted that the slabs in either instance may be thus produced and installed in the buildin%or construction at a minimum cost. he slabs, while constructed in various proportions, shapes and sizes, necessarily embody thespaced ribs or tongues, together with the reinforcing members mentioned, and the construction, while simple, is strong, durable, light and efi'ective.

Having t us described the invention, what I claim is: A reinforced plastic slab adapted to be correspond to produced at a factory having general stock, and various sizes and furnished to the market for use; or adapted to be constructed in close proximity to the construction upon which it is tobe used, comprising a member having one of its faces formed with outwardly projecting spaced parallel ribs, a reinforcing element in its flat surface, consisting of finely meshed wire screening, a reinforcing element in each of the ribs consisting of a single length of iron rod having its ends bent upwardly and each of said ribs having a central longitudinally extending depression, in the spaces between said ribs, a superimposed filler mass adapted to be placed and a similar raised portion on said slabs and to settle on and between the said ribs, saidmass also being provided with reinforcing elements that substantially those of the ribbed slabs. In testimony whereof I aflix my signature in presence of two Witnesses.

'ROBERT'L. DAY.

Witnesses: V

' F. W. MoCULLoUcH,

DANIEL DAWSON. 

